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Unformatted text preview: m 0.3048 mi ft 5280 s 3600 hr 1 hr mi 90 = Therefore, its KE is ( ) ( ) J 115 40.2 0.14 2 1 2 1 2 2 = = Mv 3. Dimensional Analysis It is often useful to see if an algebraic equation is dimensionally correct, i.e., if the units are consistent. Nomenclature: [ t ] means units of t . Therefore [ t ] s = if t represents time Clicker questions 1 3 . Lecture 2 pls-2.3 4. Trigonometry Trig functions: clicker questions 4 . Inverse trig functions: clicker question 5 Pythagorean theorem: clicker question 6 . Arc length and radians: clicker question 7 . The radian is a unitless unit because an angle expressed in radians is the ratio of two lengths, e.g., 5 m/2m = 2.5 (radians). The radian unit is used to remind you that the quantity at hand is an angle. Radians and degrees: clicker question 8 ....
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